DatastoreDisabledCacheManager

class lsst.daf.butler.DatastoreDisabledCacheManager(config: Union[str, DatastoreCacheManagerConfig], universe: DimensionUniverse)

Bases: AbstractDatastoreCacheManager

A variant of the datastore cache where no cache is enabled.

Parameters:

configstr or DatastoreCacheManagerConfig

Configuration to control caching.

universeDimensionUniverse

Set of all known dimensions, used to expand and validate any used in lookup keys.

Attributes Summary

cache_size	Size of the cache in bytes.
file_count	Return number of cached files tracked by registry.

Methods Summary

find_in_cache(ref, extension)	Look for a dataset in the cache and return its location.
known_to_cache(ref[, extension])	Report if a dataset is known to the cache.
move_to_cache(uri, ref)	Move dataset to cache but always refuse and returns None.
remove_from_cache(ref)	Remove datasets from cache.
should_be_cached(entity)	Indicate whether the entity should be added to the cache.

Attributes Documentation

cache_size

Size of the cache in bytes.

file_count

Return number of cached files tracked by registry.

Methods Documentation

find_in_cache(ref: DatasetRef, extension: str) → Iterator[Optional[ResourcePath]]

Look for a dataset in the cache and return its location.

Never finds a file.

known_to_cache(ref: DatasetRef, extension: Optional[str] = None) → bool

Report if a dataset is known to the cache.

Always returns False.

move_to_cache(uri: ResourcePath, ref: DatasetRef) → Optional[ResourcePath]

Move dataset to cache but always refuse and returns None.

remove_from_cache(ref: Union[DatasetRef, Iterable[DatasetRef]]) → None

Remove datasets from cache.

Always does nothing.

should_be_cached(entity: Union[DatasetRef, DatasetType, StorageClass]) → bool

Indicate whether the entity should be added to the cache.

Always returns False.